God is not a man;
he will not lie.
God is not a human being;
his decisions will not change.
If the Lord says he will do something,
then he will do it.
If the Lord makes a promise,
then he will do the thing he promised.
Also, it is important that God made a vow (promise) when he made Jesus high priest. {\cf2\super [71]} When those other men became priests, there was no vow.
The law chooses high priests who are people and have the same weaknesses as people. But God made a promise that came after the law. God spoke those words with a vow (promise), and those words made the Son of God to be the high priest. And that Son has been made perfect forever.